{"product_id":"cat-4w5477-4w-5477-hydraulic-gear-pump-771c-775b-pr-1000","title":"CAT 4W5477 (4W-5477) Gear Pump | Fits 771C 775B PR-1000C PR-1000 PR-450C PR-450 PR-750B 9C 9U 9S 772B 768C","description":"\u003cp\u003ePremium hydraulic gear pump designed as a direct OEM-compatible replacement for a wide range of Caterpillar (CAT) heavy machinery, including rigid dump trucks, road cold planers, and track-type tractors. Engineered to deliver exceptional volumetric efficiency, stable fluid power, and an extended service life under the most demanding earthmoving, mining, and paving operations.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 4W5477 \/ 4W-5477\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Fit OEM Replacement:\u003c\/strong\u003e Form, fit, and function perfectly match original Caterpillar engineering specifications, ensuring hassle-free drop-in installation without modifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Construction:\u003c\/strong\u003e Built with high-strength anti-wear housings and precision-machined gears to withstand continuous high-pressure hydraulic demands and rugged field environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptimized Efficiency:\u003c\/strong\u003e Advanced pressure-balanced design minimizes internal friction and fluid leakage, maximizing hydraulic system responsiveness and overall machinery fuel efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse; margin: 15px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2; border-bottom: 2px solid #dddddd;\"\u003e\n      \u003cth style=\"padding: 10px; text-align: left; border: 1px solid #dddddd;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"padding: 10px; text-align: left; border: 1px solid #dddddd;\"\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e4W5477 \/ 4W-5477\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f9f9f9;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHeavy-Duty Hydraulic Gear Pump\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eBrand Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eCaterpillar (CAT)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f9f9f9;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eMain Hydraulic steering, Transmission, or Implement System\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHigh-Strength Wear-Resistant Alloys \u0026amp; Rigid Cast Iron\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f9f9f9;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e12 Months Warranty\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCompatible Models \u0026amp; Equipment\u003c\/h2\u003e\n\u003cp\u003eThis heavy-duty gear pump is precision-engineered to fit a versatile fleet of Caterpillar machinery and attachments:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaterpillar Off-Highway Trucks \u0026amp; Tractors:\u003c\/strong\u003e 771C \/ 775B \/ 772B \/ 768C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaterpillar Road Cold Planers:\u003c\/strong\u003e PR-1000C \/ PR-1000 \/ PR-450C \/ PR-450 \/ PR-750B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaterpillar Bulldozer Equipment \/ Blades:\u003c\/strong\u003e 9C \/ 9U \/ 9S\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Equipment Hydraulic Systems:\u003c\/strong\u003e Reliable fluid power supply for heavy truck steering, road milling depth adjustments, and bulldozer blade control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoad Construction \u0026amp; Mining Operations:\u003c\/strong\u003e High durability for heavy duty cycles in asphalt paving, milling, quarry hauling, and aggregate production.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHydraulic System Restoration:\u003c\/strong\u003e Eliminates slow cycle times, erratic pressure delivery, and fluid slip to fully restore heavy machinery efficiency back to factory standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose Our Aftermarket CAT Pumps?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGuaranteed OEM Quality:\u003c\/strong\u003e Manufactured under strict ISO 9001 quality guidelines to meet or exceed original equipment fitment and long-term durability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCost-Effective Solution:\u003c\/strong\u003e Get dependable dealer-level performance and exact specifications at a highly competitive aftermarket price point.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReady to Ship:\u003c\/strong\u003e Maintained in stock for quick international dispatch, cutting down your fleet breakdown time significantly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry-Leading Support:\u003c\/strong\u003e Backed by a full 1-year warranty and a seasoned team of heavy machinery hydraulic technical experts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cdiv style=\"background-color: #f9f9f9; border-left: 4px solid #0056b3; padding: 15px; margin-bottom: 15px;\"\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: Is this 4W5477 gear pump compatible with both CAT trucks and road planers?\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the 4W-5477 gear pump is a versatile hydraulic unit utilized across several CAT applications. It features identical mounting patterns and port alignments to perfectly serve as a multi-model direct replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background-color: #f9f9f9; border-left: 4px solid #0056b3; padding: 15px; margin-bottom: 15px;\"\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: What critical steps should be taken during installation of this pump?\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e To ensure optimal performance and long life, you must drain the old fluid, thoroughly flush the hydraulic reservoir\/lines to remove debris, replace all filters, and pre-fill the pump with clean hydraulic fluid prior to cranking the engine.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background-color: #f9f9f9; border-left: 4px solid #0056b3; padding: 15px; margin-bottom: 15px;\"\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: Do your hydraulic pumps undergo factory testing?\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Absolutely. Every single gear pump undergoes rigorous functional, flow, and pressure testing under simulated operating loads before packaging to guarantee out-of-the-box reliability.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background-color: #f9f9f9; border-left: 4px solid #0056b3; padding: 15px; margin-bottom: 15px;\"\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: How fast can I get this pump for an urgent machine repair?\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e We know how costly machine downtime is. In-stock 4W5477 pumps are packed and processed quickly, utilizing express air shipping carriers to get your machinery back on the job site as fast as possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv style=\"text-align: center; background-color: #f4f6f8; padding: 15px; border-radius: 6px; margin: 25px 0;\"\u003e\n  \u003cspan style=\"font-size: 16px; color: #333;\"\u003eExplore our full range of heavy-duty hydraulic pumps:\u003c\/span\u003e \n  \u003cbr style=\"margin-bottom: 5px;\"\u003e\n  \u003ca href=\"\/collections\/gear-pump-caterpillar\" style=\"color: #0056b3; font-weight: bold; text-decoration: underline; font-size: 17px;\"\u003e\n    View All Caterpillar Gear Pumps »\n  \u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"text-align: center; margin-top: 30px;\"\u003eNeed a Quote for CAT 4W5477?\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003eContact us today for the latest pricing, bulk discounts, and shipping availability.\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin-bottom: 30px;\"\u003e\n  \u003ca href=\"\/pages\/contact\" style=\"background-color: #ffcc00; color: #000; padding: 12px 25px; text-decoration: none; font-weight: bold; border-radius: 4px; display: inline-block;\"\u003eRequest a Quote\u003c\/a\u003e\n\u003c\/p\u003e","brand":"HEPUMP","offers":[{"title":"Default Title","offer_id":47104470941852,"sku":null,"price":0.0,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/7385\/0524\/files\/caterpillar-4w-5477-hydraulic-gear-pump-heavy-equipment-1.jpg?v=1782308187","url":"https:\/\/hepumpstore.com\/products\/cat-4w5477-4w-5477-hydraulic-gear-pump-771c-775b-pr-1000","provider":"HEPUMP","version":"1.0","type":"link"}